Efficient calculations
The energy-based finite element method and the energy-based boundary element method are used for problems that require too much computing power in conventional FEM and BEM due to their structure and size.
As a full-service provider, we carry out both EFEM and EBEM analyses for you. We assist you with the conception, calculate results and derive recommendations for action for you.
Why EBEM and EFEM?
Where energy-based methods come in
Conventional FEM and BEM require a great deal of computing power for complex systems. In the high frequency range, they also require very fine meshes in order to accurately represent the spatial and temporal changes. Energy-based methods such as EFEM and EBEM work with energy densities instead of displacements or stresses. Because the energy density is not oscillatory, the element size can be selected independently of the frequency. This means that a high - or even unmanageable - number of degrees of freedom can be avoided in complex models.
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Efficiency
EFEM and EBEM do not require finer discretizations in the high-frequency range. This makes their calculation efficient.
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Complexity
EBEM is suitable for large, complex systems as it is faster and more scalable.
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Various elements
Even structural elements that are difficult to calculate, such as weld seams/spots, metamaterials etc., can be mapped.
Areas of application
Areas with problematic complexity for FEM and BEM
Automotive industry
Vibroacoustic analyses of complex/large vehicle models, especially for lightweight constructions. EFEM/EBEM enable the investigation of vibration excitation and sound radiation more efficiently than conventional methods.
Aerospace
Weight reduction and sound absorption.
EFEM/EBEM can be used to analyze cabin noise, engine noise and structural resonance.
Rail transport
Investigation of noise and vibration problems in rail vehicles and along the track.
EFEM/EBEM can be used to analyze sound insulation, resonance problems and vibration reduction.
Shipbuilding
Vibroacoustic analyses in ships, especially with regard to passenger and crew comfort as well as environmental impact due to underwater noise.
EFEM/EBEM enable efficient calculation in large, complex structures and coupled structure-fluid problems.
Mechanical engineering
Reduction of noise and vibrations in machines and systems, such as motors, gearboxes, pumps and fans.
EFEM/EBEM can be used to optimize vibration-isolated suspensions or sound-absorbing materials.
Construction and architecture
When analyzing sound transmission and vibration problems in buildings, bridges and roads.
EFEM/EBEM can be used to investigate sound insulation, sound reflections and vibration effects on structures.
EFEM in lightweight construction
The trend towards lightweight construction concepts leads to new challenges in NVH, particularly in the high frequency range. Vibrations of individual components (e.g. engine vibrations) are transmitted to the lightweight structure to a greater extent than is the case with conventional designs and therefore have a significant influence on the vibro-acoustic behavior of the vehicle. Read here how we find answers to these challenges with the help of EFEM.
Answers to complex questions
Do you have a calculation problem that cannot be solved in a reasonable amount of time? We support you with our high-performance computers and alternative methods such as EFEM and EBEM to make the decisions possible. I will be happy to advise you!
